Cryoablation Versus Medical Therapy in Desmoid Tumors Progressing After Watchful Waiting

This study is looking for volunteers who are at least 13 years old and have a desmoid tumour that is not inside the tummy area (extra-peritoneal). We need to have a clear diagnosis of your tumour from a recent biopsy.

Your tumour must have started to grow or cause more symptoms after a period where doctors were just watching it. It also needs to be easily reached by the special tools used for cryoablation, and the doctors must be confident they can remove 100% of it using this method, even if it takes more than one try. You should also be generally well, able to carry out your normal daily activities, and have healthy blood test results.

The specific details of your participation, such as how many visits you'll need, what assessments will be done, and the total duration, are not fully described in this summary. However, you would be randomly assigned to either receive cryoablation or medical therapy. Cryoablation is a procedure, so it would involve appointments for the treatment itself. Medical therapy would involve taking medication, likely with regular check-ups to monitor its effects. There would be imaging scans, like MRI, to keep track of your tumour's size and to see how well the treatment is working. You will have regular checks of your health and blood tests. You'll need to use reliable contraception if you're a woman who could become pregnant. The study aims to follow your progress and the effect of the treatment over time.